There may be no single cause of bipolar disorder (aka manic depression). Instead, research indicates the causes of bipolar disorder are probably a combination of biochemical, genetic and environmental factors that may trigger and perpetuate the chemical imbalances in the brain.
Net worth: $829 million. Telecommunications mogul Strive Masiyiwa is widely regarded as the richest man in Zimbabwe and is one of the richest men in Africa with a net worth of more than US$800 million.
According to the 2014 Wealth-X Ultra Wealth Report, South Africa is the 33rd richest country in terms of the population worth more than US$30 million â the highest ranking African country.South Africa is home to 835 UHNW individuals â up 7.7% from 775 individuals in 2013 â worth US$112 billion.his represents 17.8% of South Africaâs total wealth, which the research group lists at US$630 billion. âSouth Africa remains Africaâs largest UHNW country, accounting for just under 30% of the regionâs total UHNW population,â Wealth-X said.